1 The expected genotype frequencies. 2  The number of heterozygous individuals that you would predict to be in this population. 3  The expected phenotype frequencies. 4  Conditions happen to be really good this year for breeding and next year there are 1,245 young potential Biology instructors.
Freebase(0.00 / 0 votes)Rate this definition: Donkey. The donkey or ass, Equus africanus asinus, is a domesticated member of the Equidae or horse family. The wild ancestor of the donkey is the African wild ass, E. africanus. The donkey has been used as a working animal for at least 5000 years.
Jack is the term used for the male, Jennet or Jenny for the female and Gelding for the castrated Jack donkey. Geldings and Jennies make the best pets as they are usually evenly tempered. A Jack on the other hand has certain instincts and actions that are not suitable as pets or as companion animals.